etheryoudaoicibaDictYouDict
ether: [17] Greek aithér denoted the ‘upper atmosphere’, and by extension the ‘substance that permeated the cosmos’, from which the stars and planets were made. It was a derivative of the verb aíthein ‘ignite, blaze, shine’, a relative of Latin aestās ‘summer’, from which English gets aestivate [17]. It passed into English via Latin aethēr, and to begin with was used in its original Greek senses. Its application to the liquid with anaesthetic properties dates from the mid 18th century, the use of its first syllable in the names of organic compounds in the bicarbon series (such as ethyl and ethane) from the mid 19th century.
=> aestivate, ethyl
plasticyoudaoicibaDictYouDict
plastic: [16] Plastic is etymologically a ‘mouldable’ substance. The word comes via French plastique and Latin plasticus from Greek plastikós ‘fit for moulding’, a derivative of the verb plássein ‘mould’ (source also of English plasma [18] and plaster). Up until the 20th century its main use in English was as an adjective, meaning ‘pliable’. The first record of its use for a ‘synthetic material made from organic compounds’ comes from 1909. The trade-name Plasticine was coined from it in the 1890s.
=> plasma, plaster
protein (n.)youdaoicibaDictYouDict
1844, from French protéine, coined 1838 by Dutch chemist Gerhard Johan Mulder (1802-1880), perhaps on suggestion of Berzelius, from Greek proteios "the first quality," from protos "first" (see proto-) + -ine (2).

Originally a theoretical substance thought to be essential to life, further studies of the substances he was working with overthrew this, but the words protein and proteid continued to be used in international work on the matter and also for other organic compounds; the modern use as a general name for a class of bodies arose in German. The confusion became so great a committee was set up in 1907 to sort out the nomenclature, which it did, giving protein its modern meaning and banishing proteid.
petrichoryoudaoicibaDictYouDict
"A pleasant smell that frequently accompanies the first rain after a long period of warm, dry weather", 1960s: blend of petro- 'relating to rocks' (the smell is believed to be caused by a liquid mixture of organic compounds which collects in the ground) and ichor.
bio-organicyoudaoicibaDictYouDict
"Of or relating to organic compounds involved or produced in biological processes; designating such compounds", 1930s; earliest use found in Science. From bio- + organic.
aliphaticyoudaoicibaDictYouDict
"Relating to or denoting organic compounds in which carbon atoms form open chains (as in the alkanes), not aromatic rings", Late 19th century (originally used of the fatty acids): from Greek aleiphar, aleiphat- 'fat' + -ic.